SU1250741A1 - System for synchronizing movement of hydraulic cylinders - Google Patents

Description

The invention relates to hydraulic systems in mechanical engineering, in particular, to the synchronization of the movement of hydraulic fluid, and the y-slug is to be used in the hydraulic devices of machine tools and machines.

The purpose of the invention is to obtain synchronization in both forward and reverse course of the hydraulic cylinders.

The drawing shows the scheme of the proposed system.

The system contains hydrocypindra

1 and 2 connected to the actuator 3, the power source 4 and the drain 3 connected through a reversing valve 6 to the rod cavities 7 and 8 of the hydraulic cylinders 1 and

2 with spool devices 9 and 10, rigidly connected to hydraulic cylinders 1 and 2 through three-line hydraulically controlled balancing valves 11 and 12, from which valve I1 cavity 3 hydraulic steering: connected to piston cavity 14 of hydraulic cylinder 1 and through the channel

15 - with working throttling edges 16 and 17 of the spool device 9, and the hydraulic control cavity 18 is connected to its inlet 19. The distributor 10 of the cavities 20 and 21 of the control hydraulic valve is connected similarly to the distributor 9 to the piston cavity 22 of the hydraulic cylinder 2, through channel 23 - c throttling edges 24 and 25 of spool device 10 and its inlet 26, and spool devices 9 and 10 are spring-loaded and connected by a flexible element 27 to tension device 28.

The system works as follows.

When driving hydraulic cylinders 1 and

2 upward (according to the scheme) pressure from power supply 4 through reversible distributor 6 is fed to inputs 19 and 26 of the Spool-type devices, respectively 9 and 10. Under the action of pressure-. laziness of the working fluid flowing through these devices in the cavity 18

and 21, the distributors 11 and 12 are moved to the upper (according to the diagram) position, together with the cavity 14 of the hydraulic cylinder 1 through the cavity 13 of the distributor 9, the channel 15, the throttling edge 16 and the cavity 22 of the hydraulic cylinder 507412

2 through the cavity 20 of the distributor 10, the channel 23, the throttling edge 24 with the source 4 of the power supply. Due to the pressure difference in the cavities 5 13 and 18 of the distributor 9, generated by hydraulic power at the throttling edge 16, and in the cavity

20 and 21 of the distributor 10, which is created by hydroresistance at the dros10 of the guiding edge 24, the distributors 9 and 10 are held in the upper position.

If the movement of the cylinders is not synchronized, for example

15, due to an increase in the load on the hydraulic cylinder 2, which causes it to lag under the action of the bond by the flexible element 27 and springing, the throttling edge 24 opens

20 and increases the flow of working fluid into the cavity 22 of the hydraulic cylinder 2, and the throttling edge 16 reduces the flow of working fluid into the cavity 14 of the hydraulic cylinder 1, which will align the speeds of movement of the hydraulic cylinders I and 2.

The reversal of the direction of movement of the hydraulic cylinders 1 and 2 is carried out by switching the distributor 6, which connects the throat cavities 7 and 8 of the hydraulic cylinders I and 2 to the power source 4 in a new position. When this cavity 18 and

21 is connected with the drain 5, under the action of the working fluid flows from along, f of the bones 14 and 22 of the hydraulic cylinders 1 and 2, at the beginning of their movement, the valves AND and 12 move downward (according to the diagram), together the cavity 14 with the throttling edge 17 of the spool valve

Q device 9, and cavity 22 with throttling edge 25 of spool device 10, and are kept in the lower position under the action of pressure drop, respectively, in cavities

., 18 and 13, due to the resistance of the throttling edge 17, and in cavities 21 and 20 due to the resistance of the throttling edge 25.

5Q In case of synchronous disturbance, the speeds of movement of the hydraulic cylinders I and 2 are restored in a similar upward motion — by changing the resistances of the children of x edges 1 7

55 25.

Sch7

Editor Y. Sereda

Compiled by V. Primazov

Tehred O.Gortvay Proofreader M, Sharoshi

Order 4390/29, Draw 610, Subscription

VIIIPI State Committee of the USSR

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

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Production and printing company, Uzhgorod, st. Project, 4

Claims (3)

1. SYSTEM OF SYNCHRONIZATION OF MOTION OF HYDROCYLINDERS, comprising a pump, two movable hydraulic cylinders separated by fixed pistons into rod and piston cavities, communicated by hydraulic lines between each other and through a reversible distributor - with a pump and drain, and a synchronization system including spool devices whose housings are rigidly connected to hydraulic cylinders, and the spools are spring-loaded and interconnected by a flexible element thrown through the blocks with a tension regulator, characterized in that, in order to obtain synchronization as For direct and reverse hydraulic cylinders, each hydraulic cylinder is equipped with a three-line hydraulically controlled matching distributor, the spool devices are double-left, and the throttling slots of each spool device are each connected through one of the matching distributors to the piston cavity of the hydraulic cylinder, to which one of the hydraulic control cavities of the matching distributor, and its other hydraulic control cavity is connected to the reversible distributor. 2. The system of pop. ^ characterized in that the matching distributor is made in one housing with a spool device, and the connection of the hydraulic control cavity of the matching distributor with a reversing distributor is made through a spool device. 3. The system of claims. 1 and 2, which means that the locking member of the matching distributor comprises a channel connecting the input lines of the distributor to its hydraulic control cavity connected to the piston cavity of the hydraulic cylinder. ) 2 5074)